Convert International table BTU per hour per square inch per degree Fahrenheit to International table BTU per hour per square foot per degree Fahrenheit
Convert International table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) to International table BTU per hour per square foot per degree Fahrenheit (BTU(IT)/(h·ft²·°F)) instantly and accurately.
Conversion Formula
BTU(IT)/(h·ft²·°F) = BTU(IT)/(h·in²·°F) × 144
About International table BTU per hour per square inch per degree Fahrenheit
The international table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) equals ≈ 817.67 W/(m²·K) (1 in² = 6.4516×10⁻⁴ m²; 1 °F = 5/9 K). Encountered in US electronics thermal management, semiconductor package datasheets, and heat sink characterisation where contact areas are measured in square inches. 1 BTU(IT)/(h·in²·°F) ≈ 817.67 W/(m²·K).
About International table BTU per hour per square foot per degree Fahrenheit
The international table BTU per hour per square foot per degree Fahrenheit (BTU(IT)/(h·ft²·°F)) equals 1055.05585262/(3600×0.09290304×5/9) ≈ 5.6783 W/(m²·K). The dominant heat transfer coefficient unit in US engineering: ASHRAE handbooks, ASTM standards, boiler and heat exchanger design, and building envelope U-values are all commonly tabulated in this unit. 1 BTU(IT)/(h·ft²·°F) ≈ 5.6783 W/(m²·K).
Quick Reference Table
| International table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) | International table BTU per hour per square foot per degree Fahrenheit (BTU(IT)/(h·ft²·°F)) |
|---|---|
| 1 BTU(IT)/(h·in²·°F) | 144 BTU(IT)/(h·ft²·°F) |
| 2 BTU(IT)/(h·in²·°F) | 288 BTU(IT)/(h·ft²·°F) |
| 5 BTU(IT)/(h·in²·°F) | 720 BTU(IT)/(h·ft²·°F) |
| 10 BTU(IT)/(h·in²·°F) | 1440 BTU(IT)/(h·ft²·°F) |
| 25 BTU(IT)/(h·in²·°F) | 3600 BTU(IT)/(h·ft²·°F) |
| 50 BTU(IT)/(h·in²·°F) | 7200 BTU(IT)/(h·ft²·°F) |
| 100 BTU(IT)/(h·in²·°F) | 14400 BTU(IT)/(h·ft²·°F) |